/*
 *  Copyright 2008 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.mybatis.generator.codegen.ibatis2.sqlmap.elements;

import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.dom.xml.Attribute;
import org.mybatis.generator.api.dom.xml.TextElement;
import org.mybatis.generator.api.dom.xml.XmlElement;
import org.mybatis.generator.codegen.ibatis2.Ibatis2FormattingUtilities;

/**
 * 
 * @author Jeff Butler
 * 
 */
public class UpdateByExampleSelectiveElementGenerator extends AbstractXmlElementGenerator
{
    
    public UpdateByExampleSelectiveElementGenerator()
    {
        super();
    }
    
    @Override
    public void addElements(XmlElement parentElement)
    {
        XmlElement answer = new XmlElement("update"); //$NON-NLS-1$
        
        answer.addAttribute(new Attribute("id", introspectedTable.getUpdateByExampleSelectiveStatementId())); //$NON-NLS-1$
        
        context.getCommentGenerator().addComment(answer);
        
        StringBuilder sb = new StringBuilder();
        
        sb.append("update "); //$NON-NLS-1$
        sb.append(introspectedTable.getAliasedFullyQualifiedTableNameAtRuntime());
        answer.addElement(new TextElement(sb.toString()));
        
        XmlElement dynamicElement = new XmlElement("dynamic"); //$NON-NLS-1$
        dynamicElement.addAttribute(new Attribute("prepend", "set")); //$NON-NLS-1$ //$NON-NLS-2$
        answer.addElement(dynamicElement);
        
        for (IntrospectedColumn introspectedColumn : introspectedTable.getAllColumns())
        {
            XmlElement isNotNullElement = new XmlElement("isNotNull"); //$NON-NLS-1$
            isNotNullElement.addAttribute(new Attribute("prepend", ",")); //$NON-NLS-1$ //$NON-NLS-2$
            isNotNullElement.addAttribute(new Attribute("property", introspectedColumn.getJavaProperty("record."))); //$NON-NLS-1$ //$NON-NLS-2$
            dynamicElement.addElement(isNotNullElement);
            
            sb.setLength(0);
            sb.append(Ibatis2FormattingUtilities.getAliasedEscapedColumnName(introspectedColumn));
            sb.append(" = "); //$NON-NLS-1$
            sb.append(Ibatis2FormattingUtilities.getParameterClause(introspectedColumn, "record.")); //$NON-NLS-1$
            
            isNotNullElement.addElement(new TextElement(sb.toString()));
        }
        
        XmlElement isParameterPresentElement = new XmlElement("isParameterPresent"); //$NON-NLS-1$
        answer.addElement(isParameterPresentElement);
        
        XmlElement includeElement = new XmlElement("include"); //$NON-NLS-1$
        includeElement.addAttribute(new Attribute("refid", //$NON-NLS-1$
            introspectedTable.getIbatis2SqlMapNamespace() + "." + introspectedTable.getExampleWhereClauseId())); //$NON-NLS-1$
        isParameterPresentElement.addElement(includeElement);
        
        if (context.getPlugins().sqlMapUpdateByExampleSelectiveElementGenerated(answer, introspectedTable))
        {
            parentElement.addElement(answer);
        }
    }
}
